Drones are as smart as you make them. If (as in my example) you tell it to follow the edge of the room based on the blueprints you have, and it runs into an obstacle like that, the "Common Sense" threshold would be a 1, so it should succeed on the test with 6 dice in its pool. If the blueprints are completely wrong, then the threshold to follow the wall would be upped to 2 or 3 as the Pilot tries to figure out if you intended it to follow the flight path you told it, or to alter the flight path to follow the wall.
I also don't think drones would be that much farther along. Remember, the drones in 2070 are now stuffed with sensors and rigger adaptations and such so they don't have to think more. Instead, in the future, they are trading off increasing the drone's intelligence for better direct control by the user. I'd probably say that in regards to today's dog-brains, they are more intelligent, but we could also list our present equipment as having Pilot 1 ratings.
Wait. Avoiding objects is a standard task for vehicle maneuvering, something that should be built into a level 1 brain much less a level 3, and you want it to make a test?
How often do cabs and commuters have wrecks in your world, anyway? How often do aircraft tumble out of the sky due to bad piloting? They're driven by the same brains, after all.
Look, I'm going to insert real world here for a minute. I've been involved at a low level with computers since my first boards in 1978. In 1982 I was one of the people saying all business computers needed was 48K -- and we were right. That isn't to say I'm the biggest geek on the board, it's to give background for the key point.
I've watched the improvement of computers and seen what's happened in just the past 30 years. Using that as a guide, the drones in Shadowrun actually seem a little on the stupid side.
Every rule-of-thumb measure we use has been "this doubles in that amount of time." Exponential growth, not linear. Theoretical limits keep getting pushed back as they're reached in practice. An iPhone G3 has more processing power and more memory than a Cray I, an iPad outdoes the 1985 Cray 2, and both do what was theoretically impossible back in 1985. We do things in cheap games today that were, well, science fiction less than a generation ago.
Let me finish by coming back to the dog brains. Did you know that all modern jetliners have dog-brain that can land at a modern airport in bad weather? The tested but not yet trusted "autopilot" can taxi, take off, get to destination, land, and taxi to gate without incident. (Taxi tests not done where idiots on baggage carts can get in the way. Yet.) Google's gotten permission from a state or two to do LIVE tests with robot-driven cars on interstates.
The shadowrun drones are probably too stupid in relation to where reality will be. And then you insist on making them even stupider by saying a system - an advanced system (level 3 pilot), would have to make a test to see if it would avoid a stationary obstacle in the flight path.